Electric time-switch.



PATENTED DEC. I2, 1905.

2 SHEETS-SHEET 1.

M. T. CAMPBELL.

ELECTRIC TIME SWITCH.

APPLIGATION FILED JUNE5 1905 Q @inw/aoco No. 807,017. PATENTBD DEG. 12, 1905.

M. T. CAMPBELL.

ELECTRIC TIME SWITCH. APPLICATION FILED JUNE 5, 1905.

2 SHEETS-SHEET 2.

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.UNITED STATESPATENT OFFICE.

MILTON T. CAMPBELL, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE- HALF TO JOHN O. ERTEL, OF INDIANAPOLIS, INDIANA.

ELECTRIC TIME-SWITCH.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application led .Tune 5, 1905. Serial No. 263,321.

To all whom it may concern.

Be it known that I, MILTON T. CAMPBELL, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful ImprovementsinTime-Switches, of which the following is a specification.

The object of my invention is to produce a simple yet eifective time-controlled means for automatically closing and opening a lighting; circuit.

The accompanying drawings illustrate my invention.

Figure 1 is a plan of a clock-train provided with an embodiment of my invention, the time-indicating dial, however, and the minutehand being omitted. Fig. 2 is an elevation of the parts beneath the operating-disk, said disk being indicated in dotted lines.` Fig. 3 is a central vertical section of the parts shown in Fig. 2, the stationary cam, however, being shown in full lines. Fig. 4 is a perspective view of the inner face of the cam-carrying disk. Fig. 5 is a side elevation of some of the parts shown in Fig. 3; Fig. 6, a front elevation on a small scale of said cam-carrying disk.

In the drawings, 10 indicates a standard twenty-four-hour time-train, the hour-sleeve 11 of which is mounted on the minute-shaft 9 and is rotated once in each twenty-four hours and carries the usual hour-hand 12, which is attachedo the hour-sleeve 11 by the usual friction-sleeve. Frictionally mounted on the sleeve 11 is a'clutch member 13, which coacts with a clutch member 14, carried by the camcarrying disk 15, sleeved upon the hour-sleeve l1, said clutch members consisting of intermeshing axial iingers, which will permit axial movement of the disk 15 on the hour-sleeve, but will produce rotation of the disk with the hour-sleeve in any axial position of the disk.

Attached to the clock-frame is a stationary cam or snail 16, which terminates at a point immediately above the axis ofthe hour-sleeve, the end being a greater distance from the frame than the beginning. Secured to the inner face of the disk 15 is an annular iiange 20, the forward end of which is rounded so as to gradually engage the snail 16 and the rear end of which is slightly undercut, as shown at 20', for a reason which will appear. Disk 15 is normally urged inward by means of a spring 21, which surrounds the hour-sleeve and lies between said disk and the hour-hand.

Secured to the clock-frame above the timeshafts and beneath the disk 15 is an insulating-plate 22, upon which are secured terminals 23 23 and 23/ 23', which form parts of the two sides of a lighting-circuit. Pivoted to the inner ends of the two terminals 23l are two swinging switch members 25 25, which are connected at their free ends by a suitable insulating-plate 26. The free ends of the two terminals 25 are normally urged outward away from contact with the adjacent ends of the terminals 23 23 by means of a light spring 27, which is only suiiicient to urge the swinging members outward and is considerably lighter than the spring 21. Pivoted to the disk 15 coincident with the axis thereof is a yoke 30, which carries a cam-flange 31, and also pivoted upon the disk in the same manner is a second yoke 32, which carries a camfiange 33, the flange 33 being slightly nearer the center than the iiange 31, so that the two iianges may be brought one within the other and adjusted relative to each other so as to change their eifective length or so as to separate them to permit individual action at different times during the twenty-four hours.

It is often desirable that automatic lighting and extinguishing be accomplished at two different periods during the twenty-four hours, and in order to do this I provide a supplemental cam-iiange 34, which may be adjusted at any desired point in an annular -slot 35, formed in disk 15, this slot being so arranged that the cam 34 will coperate with the snail 16. In order that the cam-flange 34 may be withdrawn from active position when desired, I provide a radial recess 36, into which the shank 34 of the cam-ilange 34 may be projected to thus withdraw cam 34 from alinement with the snail 16. The cam 34 is held in any desired position by means of a thumb'- nut 34.

In order to provide means by which the circuit may be closed independent of the timetrain, I provide a cam 40, which is pivoted to plate 22 adjacent the free ends of the swing-v IOO 1n operation suppose it be desired to close the lighting-circuit at six oclock in the eveningz'. e., eighteen oclock. The disk 15 will be turned upon the hour-sleeve until the number 18 lies immediatelybeneath the hourhand no matter where it may be, the arrangement of the cam-iiange 2O being such that its coactingend 20 will come to the end of the snail 16 when the mark 24 is uppermost. rlhe mark b24 will always be uppermost whenever the hour-hand reaches the point on the time-dial (not shown) which corresponds to the hour indicated by that portion of the disk which lies immediately beneath the hourhand-that is to say, if the num ber 4 of disk l5 lies beneath the hour-hand the hour-hand when it reaches number 4 on the time-dial will have broughtthe number 24 on the disk 15 to the highest point, and thereupon the Spring 21 will urge disk 15 inward. 1f now the cam-flange 31 has been so set that it will also be in engagement with the plate 26 when the inward movement ofthe disk 15 is accomplished, the switch-arms 25 will be swung inward and brought into engagement with the terminals 23 23 to thus complete the circuit, and the circuit will remain closed until, as the disk 15 is advanced by the time-train, the end of the cam 31 is reached, whereupon spring 27 will throw the switch members outward. The length ot' period of lighting may be determined by properly setting the cam 34 angularly on the disk 15-that is, if the lighting period is to equal the hour length of the entire cam-31 it will be so set that its forward end will engage plate 26 just as the undercut end of 20' of the iiange 2O reaches the end of the snail 16, whileiil a shorter period oi' lighting is desired the cam 3l will be advanced the required amount, so that it will engage the plate 26 or iiange 20, the arrangement being such that the time of lighting will equal the number of hours indicated between the point 24 on the dial oi' disk 15 and that point on said dial to which the rear end of the cam 31 may be brought. It' a longer period of lighting is desired, cam-flange 33 will be projected beyond either the forward or rear end of the cam 31, so as to thus give the cam-frange a greater effective length.

When it is desired to have two periods of lighting during the twenty-four hours, the iiange 34 will be properly set4 in its groove 35, so as to be acted upon by the snail 16 in the same manner as said snail acts upon the ilange 20, and the flange 83 will then be adjusted in proper correlative position to the iiange 34 in a manner which will be readily understood. It will also be apparent from the description already given that if the iianges 31 and 33 be so adjusted with relation to the flanges 2() and 34 that they will not engage the switch members at a time when said ianges 34 and 20 are not engaged by the snail there will be no clos; ing of the circuit.

I claim as my invention- 1. The combination, with a time-train, of a cam-disk driven by the hour-sleeve thereof, intermediate connections between said disk and hour-sleeve permitting axial movement ot' the disk without preventing angular movement, means for automatically shifting said disk axially, switch mechanism, and means operated by the axial movement of the disk for operating said switch mechanism.

2. The combination, with a time-train, of a cam-disk driven thereby, a spring for normally urging said cam-disk axially in one direction, a cam-Hangs carried by said cam-disk, asnail arranged to cooperate with said cam-fiange to shift said disk axially in opposition to the spring, a switch member arranged in conjunction with said cam-disk to be operated in one direction upon axial movement of thc camdisk in one direction, and means for moving the switch member in an opposite direction upon the opposite axial movement of the camdisk.

3. The combination, with a time-train comprising an hour-sleeve, of a cam-disk journaled thereon, a driving connection between said cam-disk and hour-sleeve permitting angular and axial adjustment of the disk upon the hour-sleeve, a cam-Flange carried by the calndisk, a coacting stationary snail coacting .with said cam-Harige to shii't the cam-disk axially in one direction, a spring` serving to urge the cam-disk axially in the opposite direction, an angularly-adjustable cam-lange carried by said cam-disk, and a movable switch member arranged to be engaged by said angularly-adjustable cam-ilange.

4. The combination, with a time-train comprising an hour-sleeve, of acam-disk journaled thereon, a driving connection between said cam-disk and hour-sleeve permitting angular and axial adjustment 0i' the disk upon the hour-sleeve, a cam-flange carried by the camdisk, a coacting stationary snail coacting with said cam-fiange to shift the cam-disk axially in one direction, an angularly-adjustable camiiange carried by said cam-disk, and a movable switch member arranged to be engaged by said angularly-adjustable cam-ilange, and a second angularly adjustable switch operating cam- 'lfiange also carried by a cam-disk.

5. The combination, with a time-train comprising an hour-sleeve, of a cam-disk journaled thereon, a driving connection between said cam-disk and hour-sleeve permitting angular and axial adjustment of the disk upon the hour-sleeve, a cam-iiange carried by the calndisk, a coacting stationary snail coacting' with said cam-iiange to shift the cam-disk axially in one direction, an angularly-adjustable camiiange carried by said cam-disk, a movable IIO In Witness whereof have hereunto set Iny hand and seal at Indianapolis, Indiana, this 3d IO day of June, A. D. 1905.

MILTON T. CAMPBELL. [L s.]

Witnesses:

ARTHUR M. Hoon, JAMES A. WALSH. 

